The University of Central Arkansas (UCA) reversed part of its speech code on Wednesday after an academic watchdog group said a portion of it was unconstitutional earlier that day.

The Foundation for Individual Rights in Education (FIRE) took issue with the part of UCA’s list of “offenses subject to disciplinary action” which said students could face punishment for “annoying” another person on campus. In a blog post, FIRE contended such speech is constitutionally protected by the First Amendment...